Which of the following definitions are not proper.

A.Swimming is when you propel yourself through the water with parts of your body.

B.Swimming is a sport in which you propel yourself through the water with parts of your body.

C.A department store is a store where all kinds of commodities are bought.

D.A department store is a place where all kinds of commodities are bought.

正确答案：Swimming is when you propel yourself through the water with parts of your body.；A department store is a store where all kinds of commodities are bought.